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1. 发明授权

US08194771B2 Transmission method and apparatus in a multiple antenna communication system 有权
标题翻译：多天线通信系统中的传输方法和装置
公开(公告)号：US08194771B2
公开(公告)日：2012-06-05
申请号：US10990143
申请日：2004-11-16
申请人： Joachim S. Hammerschmidt , Robert John Kopmeiners , Xiaowen Wang
发明人： Joachim S. Hammerschmidt , Robert John Kopmeiners , Xiaowen Wang
IPC分类号： H04B7/02
CPC分类号： H04L1/06 , H04B7/0671
摘要： A method and apparatus are disclosed for transmitting symbols in a multiple antenna communication system. The disclosed frame structure comprises a preamble having a plurality of long training symbols that are transmitted on a plurality transmit antennas. At least a portion of the frame is delayed on at least one transmit antenna. The disclosed frame formats of the present invention are backwards compatible to existing single antenna communication systems. The delay amount, D, can be approximately equal to one OFDM time sample period, T. The delayed version can be obtained by introducing a time delay into a signal on the delayed branch(es) or by cyclically shifting at least a portion of each frame on the delayed branch(es). The entire frame or only the preamble portion of each frame can be delayed.
摘要翻译：公开了用于在多天线通信系统中发送符号的方法和装置。所公开的帧结构包括具有在多个发射天线上发射的多个长训练符号的前同步码。帧的至少一部分在至少一个发射天线上被延迟。所公开的本发明的帧格式向后兼容于现有的单一天线通信系统。延迟量D可以近似等于一个OFDM时间采样周期T.延迟版本可以通过在延迟分支上的信号中引入时间延迟或者通过周期性地移位每个在延迟分支上的框架。每个帧的整个帧或仅前导码部分可以被延迟。

2. 发明授权

US07813374B2 Multiple protocol wireless communication baseband transceiver 失效
标题翻译：多协议无线通信基带收发器
公开(公告)号：US07813374B2
公开(公告)日：2010-10-12
申请号：US11433997
申请日：2006-05-15
申请人： Rajendra Tushar Moorti , Jason A. Trachewsky , Joachim S. Hammerschmidt , Ling Su
发明人： Rajendra Tushar Moorti , Jason A. Trachewsky , Joachim S. Hammerschmidt , Ling Su
IPC分类号： H04J3/22
CPC分类号： H04L1/0068 , H04L1/0001 , H04L1/0041 , H04L1/0054 , H04L1/0071 , H04L1/0083
摘要： A multi-protocol wireless communication baseband transceiver includes a baseband transmit processing module and a baseband receive processing module. The baseband transmit processing module includes an encoding module, an interleaving module, a plurality of symbol mapping modules, a plurality of domain conversion modules, a plurality of cyclic prefix modules, a plurality of compensation modules, and a control module that is operably coupled to produce preamble set up information and payload set up information based on a mode of a plurality of protocol modes. The baseband receive processing module includes a plurality of receive compensation modules, a plurality of cyclic prefix removal modules, a plurality of receive domain conversion modules, an equalizing module, a plurality of demapping modules, a deinterleaving module, a decoding module, and a receive control module that is operably coupled to determine the mode from the plurality of protocol modes and the compensation control signals based on the at least one compensated stream of symbols.
摘要翻译：多协议无线通信基带收发器包括基带发射处理模块和基带接收处理模块。基带发送处理模块包括编码模块，交织模块，多个符号映射模块，多个域转换模块，多个循环前缀模块，多个补偿模块以及可操作地耦合到基于多个协议模式的模式产生前导码建立信息和有效负载建立信息。基带接收处理模块包括多个接收补偿模块，多个循环前缀去除模块，多个接收域转换模块，均衡模块，多个解映射模块，解交织模块，解码模块和接收器控制模块，其可操作地耦合以基于所述至少一个经补偿的符号流来确定来自所述多个协议模式的模式和所述补偿控制信号。

3. 发明申请

US20090304124A1 REDUCED-COMPLEXITY MULTIPLE-INPUT, MULTIPLE-OUTPUT DETECTION 有权
标题翻译：降低复杂度多输入，多输出检测
公开(公告)号：US20090304124A1
公开(公告)日：2009-12-10
申请号：US12508697
申请日：2009-07-24
申请人： Nils Graef , Joachim S. Hammerschmidt
发明人： Nils Graef , Joachim S. Hammerschmidt
IPC分类号： H04L27/06
CPC分类号： H04L25/03191 , H04B7/0413 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0321 , H04L25/03318 , H04L27/2647 , H04L2025/03414 , H04L2025/03426 , H04L2025/03643
摘要： A wireless receiver detects signals generated with a multiple-input, multiple-output (MIMO) transmitter. The receiver applies maximum-likelihood detection (MLD) for soft-output signal detection, where an MLD exhaustive search across all candidate vectors is performed recursively by computing and accumulating the differences between, for example, the Euclidean metrics of consecutive candidate tests. Difference terms used for the accumulation are also calculated recursively. An ordering of candidates, such as by a triangular-waveform shaped ordering, is employed such that only one candidate variable is changed between any two consecutive candidate evaluations, leading to a reduced set of computations.
摘要翻译：无线接收机检测由多输入多输出（MIMO）发射机产生的信号。接收机对软输出信号检测应用最大似然检测（MLD），其中通过计算和累积例如连续候选测试的欧几里德度量之间的差异来递归地执行跨所有候选向量的MLD详尽搜索。用于积累的差异项也递归计算。采用诸如通过三角形波形排序的候选者的排序，使得在任何两个连续的候选评估之间仅改变一个候选变量，导致减少的计算集合。

4. 发明授权

US07583762B2 Reduced-complexity multiple-input, multiple-output detection 失效
标题翻译：降低复杂度的多输入多输出检测
公开(公告)号：US07583762B2
公开(公告)日：2009-09-01
申请号：US10990910
申请日：2004-11-17
申请人： Nils Graef , Joachim S. Hammerschmidt
发明人： Nils Graef , Joachim S. Hammerschmidt
IPC分类号： H03D1/00
CPC分类号： H04L25/03191 , H04B7/0413 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0321 , H04L25/03318 , H04L27/2647 , H04L2025/03414 , H04L2025/03426 , H04L2025/03643
摘要： A wireless receiver detects signals generated with a multiple-input, multiple-output (MIMO) transmitter. The receiver applies maximum-likelihood detection (MLD) for soft-output signal detection, where an MLD exhaustive search across all candidate vectors is performed recursively by computing and accumulating the differences between, for example, the Euclidean metrics of consecutive candidate tests. Difference terms used for the accumulation are also calculated recursively. An ordering of candidates, such as by a triangular-waveform shaped ordering, is employed such that only one candidate variable is changed between any two consecutive candidate evaluations, leading to a reduced set of computations.
摘要翻译：无线接收机检测由多输入多输出（MIMO）发射机产生的信号。接收机对软输出信号检测应用最大似然检测（MLD），其中通过计算和累积例如连续候选测试的欧几里德度量之间的差异来递归地执行跨所有候选向量的MLD详尽搜索。用于积累的差异项也递归计算。采用诸如通过三角形波形排序的候选者的排序，使得在任何两个连续的候选评估之间仅改变一个候选变量，导致减少的计算集合。

5. 发明授权

US07356322B2 Multiple-branch wireless receiver 有权
标题翻译：多分支无线接收器
公开(公告)号：US07356322B2
公开(公告)日：2008-04-08
申请号：US10847431
申请日：2004-05-17
申请人： Joachim S. Hammerschmidt , Danilo Manstretta
发明人： Joachim S. Hammerschmidt , Danilo Manstretta
IPC分类号： H04B7/08
CPC分类号： H04B7/08 , H03G3/3078 , H04B7/0619
摘要： A wireless receiver detects signals received at two or more antennas, with each antenna coupled to an input receive chain. A switch is employed to couple selected input receive chains to one or more corresponding output receive chains during listening, coarse-detection, and fine-adjustment modes. At least one channel selection filter (CSF) is employed in each output receive chain, and the receiver employs sub-ranging. During idle mode, one antenna's input receive chain is connected to two or more CSFs to detect the packet. When the packet is detected, during a coarse-adjustment mode, the CSFs are reconfigured to couple each antenna's input receive chain to a corresponding output receive chain using low-gain signals. During fine-adjustment mode, the various gains are adjusted to be either high- or low-gain to maintain signals within the dynamic range of the corresponding CSFs.
摘要翻译：无线接收机检测在两个或多个天线处接收到的信号，其中每个天线耦合到输入接收链。在收听，粗略检测和微调模式期间，使用开关将选定的输入接收链耦合到一个或多个相应的输出接收链。在每个输出接收链中使用至少一个信道选择滤波器（CSF），并且接收机采用子范围。在空闲模式期间，一个天线的输入接收链被连接到两个或更多个CSF以检测该分组。当检测到分组时，在粗调模式期间，重新配置CSF，以使用低增益信号将每个天线的输入接收链耦合到相应的输出接收链。在微调模式期间，将各种增益调整为高或低增益，以将信号保持在相应CSF的动态范围内。

6. 发明授权

US07676001B2 MLD demapping using sub-metrics for soft-output MIMO detection and the like 有权
标题翻译：使用用于软输出MIMO检测的子度量的MLD解映射等
公开(公告)号：US07676001B2
公开(公告)日：2010-03-09
申请号：US11085025
申请日：2005-03-16
申请人： Nils Graef , Joachim S. Hammerschmidt
发明人： Nils Graef , Joachim S. Hammerschmidt
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L27/2601 , H04L27/38
摘要： A method for detecting a symbol encoded in one or more received signals, wherein the detected symbol corresponds to a combination of values of n components, n>1, comprises (a) for each of a plurality of different combinations of values of the n components, generating a set of two or more sub-metric values based on the one or more received signals. Each sub-metric is a function of one or more of the n components, and at least one sub-metric is a function of fewer than all n components. The method further comprise (b) detecting the symbol based on the sets of sub-metric values. In another embodiment, an apparatus for detecting a symbol encoded in one or more received signals, wherein the detected symbol corresponds to a combination of values of n components, n>1, comprises (a) means for generating a set of two or more sub-metric values based on the one or more received signals for each of a plurality of different combinations of values of the n components. Each sub-metric is a function of one or more of the n components, and at least one sub-metric is a function of fewer than all n components. The apparatus further comprises (b) means for detecting the symbol based on the sets of sub-metric values.
摘要翻译：一种用于检测在一个或多个接收信号中编码的符号的方法，其中所述检测到的符号对应于n个分量值n> 1的值的组合，包括（a）对于n个分量的值的多个不同组合中的每一个基于所述一个或多个接收到的信号产生一组两个或更多个子度量值。每个子度量是n个分量中的一个或多个的函数，并且至少一个子度量是少于全部n个分量的函数。该方法还包括（b）基于子度量值集合来检测符号。在另一个实施例中，一种用于检测在一个或多个接收信号中编码的符号的装置，其中所检测的符号对应于n个分量n> 1的值的组合，包括（a）用于生成一组两个或更多个子基于用于n个分量的值的多个不同组合中的每一个的一个或多个接收信号的测量值。每个子度量是n个分量中的一个或多个的函数，并且至少一个子度量是少于全部n个分量的函数。该装置还包括（b）用于基于子度量值集合来检测符号的装置。

7. 发明申请

US20090199076A1 ACKNOWLEDGEMENT MESSAGE MODIFICATION IN COMMUNICATION NETWORKS 有权
标题翻译：通信网络中的确认消息修改
公开(公告)号：US20090199076A1
公开(公告)日：2009-08-06
申请号：US12422696
申请日：2009-04-13
申请人： Jan Boer , Wilhelmus Diepstraten , Joachim S. Hammerschmidt , Syed Aon Mujtaba
发明人： Jan Boer , Wilhelmus Diepstraten , Joachim S. Hammerschmidt , Syed Aon Mujtaba
IPC分类号： G06F11/07
CPC分类号： H04L1/1829
摘要： A station for a communications network. In one embodiment, the station includes a decoder, a check processor, and a transmitter. The decoder is adapted to decode a received encoded data unit. The check processor is adapted to determine whether the encoded data unit has been correctly received. The transmitter is adapted to initiate, prior to the check processor completing the determination whether the encoded data unit has been correctly received, the transmission of an acknowledgment message comprising a frame having a plurality of different fields of data. The transmitter is adapted to modify the transmission of the acknowledgment message if the check processor determines that the data unit has not been correctly received.
摘要翻译：通信网站。在一个实施例中，站包括解码器，检查处理器和发射器。解码器适于对接收到的编码数据单元进行解码。检查处理器适于确定编码数据单元是否已被正确接收。所述发射机适于在所述检查处理器完成所述编码数据单元是否已被正确接收的确定之前发起包括具有多个不同数据场的帧的确认消息的发送。如果检查处理器确定数据单元未被正确接收，则发射机适于修改确认消息的传输。

8. 发明授权

US07542743B2 Maximum likelihood detection for MIMO receivers 失效
标题翻译： MIMO接收机的最大似然检测
公开(公告)号：US07542743B2
公开(公告)日：2009-06-02
申请号：US11525270
申请日：2006-09-22
申请人： Joseph Paul Lauer , Joachim S. Hammerschmidt
发明人： Joseph Paul Lauer , Joachim S. Hammerschmidt
IPC分类号： H04B7/08
CPC分类号： H04L1/0054 , H04L1/06
摘要： Maximum likelihood detection of signals in a MIMO receiver. A system transformation is obtained by selecting a weighting matrix that when linearly transforming a channel utilized for wireless communication, results in a particular transformed triangular matrix. The weighting matrix is then used to provide a transformed vector for a received signal that allows a search in one constellation. In searching the constellation recursion values are used to calculate the Euclidean distances between set points of the constellation and the location on the constellation corresponding to the received signal for both bit values 0 and 1. Minimum Euclidean distances are determined for bit values 0 and 1 and the difference of the minimum Euclidean distances is used to compute the maximum likelihood value for bits contained in the received signal.
摘要翻译： MIMO接收机中信号的最大似然检测。通过选择加权矩阵获得系统变换，该加权矩阵当线性变换用于无线通信的信道时，得到特定的变换三角矩阵。然后，加权矩阵用于为允许在一个星座中进行搜索的接收信号提供变换矢量。在搜索星座递归值时，用于计算星座的设定点与位值0和1对应的接收信号对应的星座上的位置之间的欧氏距离。对于位值0和1确定最小欧几里得距离，使用最小欧几里德距离的差来计算接收信号中包含的位的最大似然值。

9. 发明授权

US08369388B2 Single-chip wireless tranceiver 有权
标题翻译：单芯片无线收发器
公开(公告)号：US08369388B2
公开(公告)日：2013-02-05
申请号：US12004406
申请日：2007-12-21
申请人： Joachim S. Hammerschmidt , Arya Reza Behzad , Keith Andrews Carter , Simeon Furrer , Rohit Vijay Gaikwad , Jason Alexander Trachewsky , Amit Bagchi , Rajendra Tushar Moorti , Venkateswara Rao Kodavati
发明人： Joachim S. Hammerschmidt , Arya Reza Behzad , Keith Andrews Carter , Simeon Furrer , Rohit Vijay Gaikwad , Jason Alexander Trachewsky , Amit Bagchi , Rajendra Tushar Moorti , Venkateswara Rao Kodavati
IPC分类号： H04B1/44
CPC分类号： H04B7/0413 , H01L2924/0002 , H01L2924/00
摘要： Embodiments of a wireless transceiver are provided. Embodiments can be used in multiple-input-multiple-output (MIMO) wireless transceivers. In an embodiment, radio control signal bundles are provided as direct parallel interconnects between digital signal processing modules and the radio module of the wireless transceiver to enable a precise low-latency control of radio functions. In another embodiment, a separate physical line is provided to control each radio setting of the radio module, thereby enabling simultaneous real-time control of any number of radio settings. In a further embodiment, the various digital and analog components of the wireless transceiver are integrated within a single chip of the same process technology.
摘要翻译：提供了无线收发器的实施例。实施例可以用于多输入多输出（MIMO）无线收发器。在一个实施例中，无线电控制信号束被提供为数字信号处理模块和无线收发器的无线电模块之间的直接并行互连，以实现无线电功能的精确的低延迟控制。在另一个实施例中，提供单独的物理线路以控制无线电模块的每个无线电设置，从而实现对任意数量的无线电设置的同时实时控制。在另一个实施例中，无线收发器的各种数字和模拟组件被集成在相同处理技术的单个芯片内。

10. 发明申请

US20120307746A1 Fair Channel Allocation for Multiple Clients 审中-公开
标题翻译：多个客户的公平渠道分配
公开(公告)号：US20120307746A1
公开(公告)日：2012-12-06
申请号：US13231402
申请日：2011-09-13
申请人： Joachim S. Hammerschmidt , Peyush Agarwal , Yasantha N. Rajakarunanayake , Praveen K. Gopala , Alexander G. MacInnis
发明人： Joachim S. Hammerschmidt , Peyush Agarwal , Yasantha N. Rajakarunanayake , Praveen K. Gopala , Alexander G. MacInnis
IPC分类号： H04W72/04
CPC分类号： H04W72/1242 , H04W72/0446 , H04W72/0486 , H04W72/12 , H04W72/1252 , H04W72/1268 , H04W72/1278 , Y02D70/1224 , Y02D70/1242 , Y02D70/1244 , Y02D70/1246 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/162 , Y02D70/164
摘要： A wireless access device transmits encoded media streams to at least first and second clients over a shared wireless channel. First and second transmission windows are established in a transmission frame interval for transmission of media packets to the first and second clients, respectively. An unused portion of one of the transmission windows is identified using, for example, transmission status information (from the wireless access device) associated with the media packets. The unused portion of the transmission window is adaptively reallocated for use in transmission of media packets associated with the other transmission window. In one mode of operation, the reallocation process may trigger a reversal in the order of the first and second transmission windows in subsequent transmission frame intervals.
摘要翻译：无线接入设备通过共享无线信道将编码的媒体流发送到至少第一和第二客户端。以传输帧间隔建立第一和第二传输窗口，以分别将媒体分组传输到第一和第二客户机。使用例如与媒体分组相关联的来自无线接入设备的传输状态信息来识别传输窗口之一的未使用部分。传输窗口的未使用部分被自适应地重新分配用于传输与另一个传输窗口相关联的媒体分组。在一种操作模式中，重新分配过程可以在随后的传输帧间隔中触发第一和第二传输窗口的顺序的反转。

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